Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$93.9M |
| 2 |
Pfizer
PFE
|
+$89.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Intel
INTC
|
+$60.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$52.5M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$146M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$109M |
| 3 |
Alibaba
BABA
|
+$81.8M |
| 4 |
Walt Disney
DIS
|
+$80.2M |
| 5 |
Citigroup
C
|
+$55.3M |
Sector Composition
| 1 | Technology | 19.03% |
| 2 | Healthcare | 13.86% |
| 3 | Consumer Discretionary | 12.44% |
| 4 | Industrials | 8.48% |
| 5 | Communication Services | 7.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
551
AerCap
AER
$21.4B
| $711K | ﹤0.01% |
8,188
-50,000
| -86% | -$4.34M |
|
|
SAGE
552
DELISTED
Sage Therapeutics
SAGE
| $711K | ﹤0.01% |
37,954
+30,499
| +409% | +$571K |
|
553
FS KKR Capital
FSK
$4.44B
| $710K | ﹤0.01% |
+37,266
| New | +$710K |
|
554
iShares Biotechnology ETF
IBB
$5.74B
| $709K | ﹤0.01% |
+5,172
| New | +$709K |
|
555
Paysafe
PSFE
$816M
| $709K | ﹤0.01% |
+44,915
| New | +$709K |
|
556
Essex Property Trust
ESS
$17.2B
| $705K | ﹤0.01% |
+2,882
| New | +$705K |
|
557
Wolverine World Wide
WWW
$2.44B
| $699K | ﹤0.01% |
62,383
+17,234
| +38% | +$193K |
|
558
3D Systems Corp
DDD
$314M
| $698K | ﹤0.01% |
157,372
+142,249
| +941% | +$631K |
|
559
Banc of California
BANC
$2.66B
| $693K | ﹤0.01% |
45,586
+31,933
| +234% | +$485K |
|
560
National Fuel Gas
NFG
$7.82B
| $690K | ﹤0.01% |
+12,856
| New | +$690K |
|
|
AIOT
561
PowerFleet Inc
AIOT
$713M
| $688K | ﹤0.01% |
128,848
+123,379
| +2,256% | +$659K |
|
562
Dover
DOV
$23.5B
| $686K | ﹤0.01% |
+3,875
| New | +$686K |
|
563
NexGen Energy
NXE
$5.03B
| $685K | ﹤0.01% |
88,270
-37,906
| -30% | -$294K |
|
564
CoreCivic
CXW
$2.24B
| $682K | ﹤0.01% |
43,745
-122,859
| -74% | -$1.92M |
|
|
LOGC
565
DELISTED
ContextLogic
LOGC
| $682K | ﹤0.01% |
120,020
+115,690
| +2,672% | +$657K |
|
566
TAL Education Group
TAL
$6.78B
| $677K | ﹤0.01% |
59,700
-42,661
| -42% | -$484K |
|
567
Chefs' Warehouse
CHEF
$2.65B
| $676K | ﹤0.01% |
17,968
+378
| +2% | +$14.2K |
|
568
Bumble
BMBL
$733M
| $673K | ﹤0.01% |
59,331
-14,313
| -19% | -$162K |
|
569
iShares MSCI Germany ETF
EWG
$2.37B
| $673K | ﹤0.01% |
+21,227
| New | +$673K |
|
570
MP Materials
MP
$13B
| $672K | ﹤0.01% |
47,022
-87,524
| -65% | -$1.25M |
|
571
Western Union
WU
$2.63B
| $671K | ﹤0.01% |
48,025
-75,931
| -61% | -$1.06M |
|
572
Build-A-Bear
BBW
$959M
| $670K | ﹤0.01% |
+22,431
| New | +$670K |
|
573
Progress Software
PRGS
$1.81B
| $666K | ﹤0.01% |
12,498
+8,937
| +251% | +$476K |
|
574
Owens Corning
OC
$12.2B
| $664K | ﹤0.01% |
+3,982
| New | +$664K |
|
575
Applied Optoelectronics
AAOI
$1.81B
| $660K | ﹤0.01% |
+47,674
| New | +$660K |
|